This contains a bunch of tips and tricks for editing IETF Drafts, beating XML2RFC into submission, etc...
Referencing an I-D
It is (reference.I-D.<draft name without "draft-" and without version>):
<?rfc include='reference.I-D.ietf-dnsop-sutld-ps.xml'?>
And to reference this reference: I-D.ietf-dnsop-sutld-ps
More information can be found here: https://xml2rfc.tools.ietf.org/